Figure 5. Stability of PEG-FGF2 conjugates in Rat plasma and wound fluid. (A ) The remaining levels of FGF2 and PEG-FGF2 conjugates in rat plasma at indicated time points.***P < 0.001 vs. FGF2 group. (B ) The remaining levels of FGF2 and PEG-FGF2 conjugates determined by ELISA kit after incubation for 24 h with wound fluids.**P < 0.01,***P < 0.001 vs. control group. All data are displayed as means ± SEM of 3 independent experiments.